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  #16 (permalink)  
Old 06-14-2017
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Join Date: Dec 1969
Location: middle Texas coast
Posts: 9,071
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what do you not understand about it sucking air instead of fuel?

you have a leak , find it
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  #17 (permalink)  
Old 06-15-2017
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Join Date: Mar 2017
Posts: 13
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I understand an air leak........On the forum looking for possibilities.......
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  #18 (permalink)  
Old 06-15-2017
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Join Date: Mar 2017
Posts: 13
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Good Idea-Thanks.... give it a whack and let you know.
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  #19 (permalink)  
Old 06-15-2017
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Join Date: Mar 2013
Location: Sailfish Capitol of the World, Florida
Posts: 305
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How about full tank vs half tank. I was drinking a Coke the other day and my straw had a crack in it. It worked fine until I got half way done, then I started sucking air... I was as frustrated with my situation as you may be with yours!
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If its got teats or tires, you bound to have trouble with it....
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  #20 (permalink)  
Old 06-15-2017
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Join Date: Jul 2016
Location: long island
Posts: 81
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I started my own post because I'm still having the same fuel issue . Last year I replaced The pressure release valve , so of course almost a year later I had the same issue happened again yesterday The VST tank ran out of fuel the motor died , The Ball was soft I was able to refill the VST tank with the primer ball and restart the motor and it ran fine let me know what you find out and maybe we could help each other I will be working on mine tomorrow
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  #21 (permalink)  
Old 06-15-2017
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Join Date: Mar 2017
Posts: 13
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I caved in...

ADD TO THE LIST OF REPLACEMENT PARTS

pickup tube in the tank , elbow and ASV. Yamaha **** plated primer bulb, 3/8 hose from the tank to the engine, hose clamps and ......the low pressure fuel pump.

So all in all i have thrown the kitchen sink at it. I plan on running tomorrow.
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  #22 (permalink)  
Old 06-16-2017
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Join Date: Mar 2017
Posts: 13
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Yes.

I called the tank manufacture and they walked me thru the test procedure. Pick up tube tested perfect.
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  #23 (permalink)  
Old 06-16-2017
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Join Date: Dec 1969
Location: middle Texas coast
Posts: 9,071
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did you look at the filter seals and connections also.
only so many connections between tank and pump where you saw the bubbles
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  #24 (permalink)  
Old 06-18-2017
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Join Date: Mar 2017
Posts: 13
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Ran 120 miles yesterday with no issues!

Before I left in the morning I changed the spin on yamaha filter on that motor. Other filter was only a couple of weeks old.

I quess that was it. Thanks for all the help and 99yam40 thanks for reminding me to check that filter again.
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